Telling family about second baby

Britney
So I have recently officially found out I'm pregnant. I have had some troubles with pregnancies in the passed and have been through a lot. Now going to have my second child I'm worried about miscarriage and lots of other things. I read up on when the best time is to tell family and honestly there is never a safe time or whatever. So a lil back story on me is I'm not married but live with my bf/fiancé of 6 years we have one 2 year old little girl together and wanted our kids to be close growing up. I'm going to school getting my degree in early education and nannying and full time mom and my oh is working for a vision health care center where he makes good money. We have a roommate and her daughter that lives with us. An we are currently looking for a bigger house. Yes it's crammed but my friend and I are switching off watching eachothers daughters while each of us go to school. I will have my certificate by the end of this summer. My question or decision is am I making the right decisions in keeping my goals and having kids so they can grow up together? An has anyone had their parents scold them for not being married or have a house with the proper job while having kids? I'm 28 years old. I don't want to miss my opportunity because I've had pregnancy problems in the passed. I just wish my parents would be as excited as I am and not be on be about goals and finances.